I just put all the sharps and the other dangerous stuff in a checked bag. Haven't lost anything yet, not even collector grade knives I've bought on the road, or in a couple of intnernational flights (one with lost luggage coming back from Italy).

One time, I forgot about the Ultimate Survival Strike Force flint/steel in my briefcase, and got the full treatment (next best thing to a strip search). They let me go, and let me keep it. That was before the lighter ban, though. Of course, I probably got off because I developed a rapport with the hand screener, due to the Wichard sailing hardware on my keychain ("Hey, are you a sailor?"), so I wouldn't recommend you try this.